From 3824c3fd0a76ba628f1dbae7305132c935e9de20 Mon Sep 17 00:00:00 2001
From: Holger Just <holger@plan.io>
Date: Wed, 20 Dec 2023 14:46:47 +0100
Subject: [PATCH] Allow consecutive footnote references in Textile #39884

---
 .../wiki_formatting/textile/redcloth3.rb        |  2 +-
 .../wiki_formatting/textile_formatter_test.rb   | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/redmine/wiki_formatting/textile/redcloth3.rb b/lib/redmine/wiki_formatting/textile/redcloth3.rb
index f545bdf91a..647bd6f8ba 100644
--- a/lib/redmine/wiki_formatting/textile/redcloth3.rb
+++ b/lib/redmine/wiki_formatting/textile/redcloth3.rb
@@ -1042,7 +1042,7 @@ def flush_left( text )
     end
 
     def footnote_ref( text )
-        text.gsub!(/\b\[([0-9]+?)\](\s)?/,
+        text.gsub!(/(?<=[\p{Word}\]])\[([0-9]+?)\](\s)?/,
                    '<sup><a href="#fn\1">\1</a></sup>\2')
     end
 
diff --git a/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb b/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
index c1923dd074..b3b81ae122 100644
--- a/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
@@ -770,6 +770,23 @@ def test_should_escape_bq_citations
       }, false)
   end
 
+  def test_should_allow_multiple_footnotes
+    text = <<~STR
+      Some demo[1][2] And a sentence.[1]
+
+      fn1. One
+
+      fn2. Two
+    STR
+
+    expected = <<~EXPECTED
+      <p>Some demo<sup><a href="#fn1">1</a></sup><sup><a href="#fn2">2</a></sup> And a sentence.[1]</p>
+      <p id="fn1" class="footnote"><sup>1</sup> One</p>
+      <p id="fn2" class="footnote"><sup>2</sup> Two</p>
+    EXPECTED
+    assert_equal expected.gsub(%r{[\r\n\t]}, ''), to_html(text).gsub(%r{[\r\n\t]}, '')
+  end
+
   private
 
   def assert_html_output(to_test, expect_paragraph = true)
-- 
2.39.2